CEVA (CEVA) 10-Q 9 Nov 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Nov. 02, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Trading Symbol	CEVA
Entity Registrant Name	CEVA INC
Entity Central Index Key	1,173,489
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		21,902,376
Entity Emerging Growth Company	false
Entity Small Company	false

INTERIM CONDENSED CONSOLIDATED

INTERIM CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 9,212	$ 21,739
Short term bank deposits	31,561	34,432
Marketable securities	78,783	82,664
Trade receivables	7,577	14,480
Accrued revenues	16,456	2,014
Prepaid expenses and other current assets	5,904	3,747
Total current assets	149,493	159,076
Long term bank deposits	47,450	44,518
Severance pay fund	9,242	8,910
Deferred tax assets	4,727	3,643
Property and equipment, net	7,979	6,926
Goodwill	46,612	46,612
Intangible assets, net	3,004	1,742
Investments in other company	1,806	1,806
Other long-term assets	4,938	3,579
Total long-term assets	125,758	117,736
Total assets	275,251	276,812
Current liabilities:
Trade payables	1,000	392
Deferred revenues	3,614	4,399
Accrued expenses and other payables	3,920	3,927
Accrued payroll and related benefits	12,529	14,077
Total current liabilities	21,063	22,795
Long term liabilities:
Accrued severance pay	9,800	9,347
Total long-term liabilities	9,800	9,347
Stockholders' equity:
Preferred Stock: $0.001 par value: 5,000,000 shares authorized; none issued and outstanding
Common Stock: $0.001 par value: 60,000,000 shares authorized; 23,595,160 shares issued at September 30, 2018 (unaudited) and December 31, 2017. 21,902,376 and 22,064,007 shares outstanding at September 30, 2018 (unaudited) and December 31, 2017, respectively	22	22
Additional paid in-capital	221,248	217,417
Treasury stock at cost (1,692,784 and 1,531,153 shares of common stock at September 30, 2018 (unaudited) and December 31, 2017, respectively)	(36,168)	(26,056)
Accumulated other comprehensive loss	(1,284)	(586)
Retained earnings	60,570	53,873
Total stockholders' equity	244,388	244,670
Total liabilities and stockholders' equity	$ 275,251	$ 276,812

INTERIM CONDENSED CONSOLIDATE_2

INTERIM CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Sep. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Preferred Stock, par value	$ 0.001	$ 0.001
Preferred Stock, shares authorized	5,000,000	5,000,000
Preferred Stock, shares issued	0	0
Preferred Stock, shares outstanding	0	0
Common Stock, par value	$ 0.001	$ 0.001
Common Stock, shares authorized	60,000,000	60,000,000
Common Stock, shares issued	23,595,160	23,595,160
Common Stock, shares outstanding	21,902,376	22,064,007
Treasury stock, shares	1,692,784	1,531,153

INTERIM CONDENSED CONSOLIDATE_3

INTERIM CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues:
Revenues	$ 21,413	$ 24,044	$ 56,476	$ 65,906
Cost of revenues	2,006	1,726	5,966	5,030
Gross profit	19,407	22,318	50,510	60,876
Operating expenses:
Research and development, net	11,897	10,031	35,756	30,413
Sales and marketing	2,727	3,057	9,302	9,422
General and administrative	2,406	2,711	8,193	7,388
Amortization of intangible assets	225	309	676	927
Total operating expenses	17,255	16,108	53,927	48,150
Operating income (loss)	2,152	6,210	(3,417)	12,726
Financial income, net	831	821	2,535	2,147
Income (loss) before taxes on income	2,983	7,031	(882)	14,873
Income taxes expense	440	1,181	847	1,008
Net income	$ 2,543	$ 5,850	$ (1,729)	$ 13,865
Basic net income (loss) per share	$ 0.12	$ 0.27	$ (0.08)	$ 0.64
Diluted net income (loss) per share	$ 0.11	$ 0.26	$ (0.08)	$ 0.62
Weighted-average shares used to compute net income (loss) per share (in thousands):
Basic	21,997	21,946	22,091	21,687
Diluted	22,428	22,683	22,091	22,480
Licensing and Related Revenue
Revenues:
Revenues	$ 9,786	$ 14,021	$ 29,907	$ 33,893
Royalties
Revenues:
Revenues	$ 11,627	$ 10,023	$ 26,569	$ 32,013

INTERIM CONDENSED CONSOLIDATE_4

INTERIM CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss):	$ 2,543	$ 5,850	$ (1,729)	$ 13,865
Available-for-sale securities:
Changes in unrealized gains (losses)	16	96	(863)	322
Reclassification adjustments for (gains) losses included in net income	32	(7)	30	33
Net change	48	89	(833)	355
Cash flow hedges:
Changes in unrealized gains (losses)	21	(2)	(259)	180
Reclassification adjustments for (gains) losses included in net income	63	2	259	(186)
Net change	84			(6)
Other comprehensive income (loss) before tax	132	89	(833)	349
Income tax expense (benefit) related to components of other comprehensive income (loss)	(1)	12	(135)	53
Other comprehensive income (loss), net of taxes	133	77	(698)	296
Comprehensive income (loss)	$ 2,676	$ 5,927	$ (2,427)	$ 14,161

INTERIM CONDENSED CONSOLIDATE_5

INTERIM CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income (loss)	$ (1,729)	$ 13,865
Adjustments required to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	1,914	1,447
Amortization of intangible assets	938	927
Equity-based compensation	8,083	6,346
Realized loss, net on sale of available-for-sale marketable securities	30	33
Amortization of premiums on available-for-sale marketable securities	609	907
Unrealized foreign exchange (gain) loss	141	(24)
Changes in operating assets and liabilities:
Trade receivables and accrued revenues	1,658	2,159
Prepaid expenses and other assets	(3,815)	(2,572)
Accrued interest on bank deposits	(643)	(3)
Deferred tax, net	(949)	(741)
Trade payables	557	(105)
Deferred revenues	(785)	(1,984)
Accrued expenses and other payables	(802)	416
Accrued payroll and related benefits	(1,329)	(1,532)
Income taxes payable	55	(1,501)
Accrued severance pay, net	149	60
Net cash provided by operating activities	4,082	17,698
Cash flows from investing activities:
Purchase of property and equipment	(2,913)	(3,340)
Purchase of intangible assets	(1,960)
Investment in bank deposits	(21,596)	(30,757)
Proceeds from bank deposits	22,065	27,050
Investment in available-for-sale marketable securities	(15,516)	(36,468)
Proceeds from maturity of available-for-sale marketable securities	10,122	8,086
Proceeds from sale of available-for-sale marketable securities	7,803	15,206
Net cash used in investing activities	(1,995)	(20,223)
Cash flows from financing activities:
Purchase of treasury stock	(16,742)
Proceeds from exercise of stock-based awards	2,249	6,898
Net cash provided by (used in) financing activities	(14,493)	6,898
Effect of exchange rate changes on cash and cash equivalents	(121)	157
Increase (decrease) in cash and cash equivalents	(12,527)	4,530
Cash and cash equivalents at the beginning of the period	21,739	18,401
Cash and cash equivalents at the end of the period	9,212	22,931
Supplemental information of cash-flow activities:
Income and withholding taxes, net of refunds	3,716	$ 3,934
Non-cash transactions:
Cumulative effect of adoption of new accounting standard	8,555
Property and equipment purchases incurred but unpaid at period end	54
Intangible assets purchases incurred but unpaid at period end	$ 750

BUSINESS

BUSINESS	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BUSINESS	NOTE 1: BUSINESS The financial information in this quarterly report includes the results of CEVA, Inc. and its subsidiaries (the “Company” or “CEVA”). CEVA licenses a family of signal processing IPs, including comprehensive platforms for 5G baseband processing in handsets and base station RAN, highly integrated cellular IoT solutions (NB-IoT Cat-M1), Wi-Fi (Wi-Fi Wi-Fi Wi-Fi CEVA’s technologies are licensed to leading semiconductor and original equipment manufacturer (OEM) companies. These companies design, manufacture, market and sell application-specific integrated circuits (“ASICs”) and application-specific standard products (“ASSPs”) based on CEVA’s technology to wireless, consumer electronics and automotive companies for incorporation into a wide variety of end products.

BASIS OF PRESENTATION AND SUMMA

BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	NOTE 2: BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation The interim condensed consolidated financial statements have been prepared according to U.S Generally Accepted Accounting Principles (“U.S. GAAP”). The accompanying unaudited interim condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States. In the opinion of management, all adjustments considered necessary for a fair presentation have been included. Operating results for the three and nine months ended September 30, 2018 are not necessarily indicative of the results that may be expected for the year ending December 31, 2018. For further information, reference is made to the consolidated financial statements and footnotes thereto included in the Company’s Annual Report on Form 10K for the year ended December 31, 2017. The significant accounting policies applied in the annual consolidated financial statements of the Company as of December 31, 2017, contained in the Company’s Annual Report on Form 10K filed with the Securities and Exchange Commission on March 1, 2018, have been applied consistently in these unaudited interim condensed consolidated financial statements, except for changes associated with recent accounting standards for revenue recognition and financial instruments for the three and nine months ended September 30, 2018, as detailed below. Changes in accounting policies as a result of adopting Topic 606 and nature of goods Effective as of January 1, 2018, the Company has followed the provisions of Accounting Standards Codification (“ASC”) Topic 606, Revenue from Contracts with Customers The following is a description of principal activities from which the Company generates revenue. Revenues are recognized when control of the promised goods or services are transferred to the customers in an amount that reflects the consideration that the Company expects to receive in exchange for those goods or services. The Company determines revenue recognition through the following steps: • identification of the contract with a customer; • identification of the performance obligations in the contract; • determination of the transaction price; • allocation of the transaction price to the performance obligations in the contract; and • recognition of revenue when, or as, the Company satisfies a performance obligation. The Company enters into contracts that can include various combinations of products and services, as detailed below, which are generally capable of being distinct and accounted for as separate performance obligations. The Company generates its revenues from (1) licensing intellectual properties, which in certain circumstances are modified for customer-specific requirements, (2) royalty revenues, and (3) other revenues, which include revenues from support, training and sale of development systems. The Company accounts for its IP license revenues and related services, which provide the Company’s customers with rights to use the Company’s IP, in accordance with ASC 606. A license may be perpetual or time limited in its application. In accordance with ASC 606, the Company will continue to recognize revenue from IP license at the time of delivery when the customer accepts control of the IP, as the IP is functional without professional services, updates and technical support. The Company has concluded that its IP license is distinct as the customer can benefit from the software on its own. Most of the Company’s contracts with customers contain multiple performance obligations. For these contracts, the Company accounts for individual performance obligations separately, if they are distinct. The transaction price is allocated to the separate performance obligations on a relative standalone selling price basis. Standalone selling prices of IP license are typically estimated using the residual approach. Standalone selling prices of services are typically estimated based on observable transactions when these services are sold on a standalone basis. When contracts involve a significant financing component, the Company adjusts the promised amount of consideration for the effects of the time value of money if the timing of payments agreed to by the parties to the contract (either explicitly or implicitly) provide the customer with a significant benefit of financing, unless the financing period is under one year and only after the products or services were provided, which is a practical expediency permitted under ASC 606. Revenues from contracts that involve significant customization of the Company’s IP to customer-specific specifications are performance obligations the Company generally accounts for as performance obligations satisfied over time. The underlying deliverable is owned and controlled by the customer, and does not create an asset with an alternative use to the Company. The Company recognizes revenue on such contracts using cost based input methods, which recognize revenue and gross profit as work is performed based on a ratio between actual costs incurred compared to the total estimated costs for the contract. Provisions for estimated losses on uncompleted contracts are made during the period in which such losses are first determined, in the amount of the estimated loss on the entire contract. Revenues that are derived from the sale of a licensee’s products that incorporate the Company’s IP are classified as royalty revenues. Royalty revenues are recognized during the quarter in which the sale of the product incorporating the Company’s IP occurs. Royalties are calculated either as a percentage of the revenues received by the Company’s licensees on sales of products incorporating the Company’s IP or on a per unit basis, as specified in the agreements with the licensees. The Company receives the actual sales data from its customers after the quarter ends and accounts for it as accrued revenue. When the Company does not receive actual sales data from the customer prior to the finalization of its financial statements, royalty revenues are recognized based on the Company’s estimation of the customer’s sales during the quarter. In addition to license fees, contracts with customers generally contain an agreement to provide for training and post contract support, which consists of telephone or e-mail Revenues from the sale of development systems are recognized when control of the promised goods or services are transferred to the customers. Deferred revenues, which represent a contract liability, include unearned amounts received under license agreements, unearned technical support and amounts paid by customers not yet recognized as revenues. The Company capitalizes sales commission as costs of obtaining a contract when they are incremental and, if they are expected to be recovered, amortized consistently with the pattern of transfer of the good or service to which the asset relates. If the expected amortization period is one year or less, the commission fee is expensed when incurred. Changes in accounting policies as a result of adopting ASU No. 2016-01, Beginning on January 1, 2018, the Company has followed the provisions of Accounting Standards Update (“ASU”) No. 2016-01, Reclassification Certain amounts in the prior years’ financial statements have been reclassified to conform to the current year’s presentation. These amounts are associated with trade receivables and accrued revenues. Such reclassifications have no effect on stockholders’ equity or net income as previously reported. Use of Estimates The preparation of the interim condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates, judgments and assumptions. The Company’s management believes that the estimates, judgments and assumptions used are reasonable based upon information available at the time they are made. These estimates, judgments and assumptions can affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the dates of the interim condensed consolidated financial statements, and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates.

REVENUE RECOGNITION

REVENUE RECOGNITION	9 Months Ended
	Sep. 30, 2018
Revenue from Contract with Customer [Abstract]
REVENUE RECOGNITION	NOTE 3: REVENUE RECOGNITION In May 2014, the Financial Accounting Standards Board (“FASB”) issued new guidance related to revenue recognition, which outlines a comprehensive revenue recognition model and supersedes most current revenue recognition guidance. ASC 606 requires a company to recognize revenue as control of goods or services transfers to a customer at an amount that reflects the expected consideration to be received in exchange for those goods or services. It defines a five-step approach for recognizing revenue, which may require a company to use more judgment and make more estimates than under the prior guidance. The Company adopted ASC 606 on January 1, 2018 for all open contracts at the date of initial application, and applied the standard using modified retrospective approach, with the cumulative effect of applying ASC 606 recognized as an adjustment to the opening retained earnings balance. Results for reporting periods beginning after January 1, 2018 are presented under ASC 606, while prior period amounts are not adjusted and continue to be reported under the accounting standards in effect for the prior period. The Company recorded a net increase to opening retained earnings of $8,555 as of January 1, 2018 due to the cumulative impact of adopting ASC 606. The impact to revenues for the three and nine months ended September 30, 2018 was an increase of $3,945 and $2,872, respectively, as a result of adopting ASC 606. With respect to the Company’s licensing business, under ASC 606, certain deliverables may now be considered as distinct performance obligations separate from other performance obligations, and will be measured using the relative standalone selling price basis, and recognized as revenue accordingly. Nevertheless, the adoption of ASC 606 for licensing and related revenues did not have a significant impact on the Company’s financial statements. With respect to the Company’s royalty business, ASC 606 did not have a significant impact. Under the accounting standards in effect during prior periods, the Company recognized sales-based royalties as revenues during the quarter, which such royalties were reported by licensees, which reflected the licensees’ prior quarter sales and when all other revenue recognition criteria were met. Under ASC 606, the Company is required to estimate and recognize sales-based royalties during the period which the associated sales occur. Accordingly, the Company has an increase in accrued revenues of $10,787 in the statement of financial position. Under ASC 606, an entity recognizes revenue when or as it satisfies a performance obligation by transferring IP license or services to the customer, either at a point in time or over time. The Company recognizes most of its revenues at a point in time upon delivery of its IPs. The Company recognizes revenue over time on significant license customization contracts that are covered by contract accounting standards using cost inputs to measure progress toward completion of its performance obligations, which is similar to the method prior to the adoption of ASC 606. The following table includes estimated revenue expected to be recognized in future periods related to performance obligations that are unsatisfied or partially unsatisfied at the end of the reporting period. The estimated revenues do not include amounts of royalties or unexercised contract renewals: Remainder of 2018 2019 2020 2021 License and related revenues $ 2,256 $ 6,730 $ 3,000 $ 1,500 In connection with the adoption of ASC 606, the Company is required to capitalize incremental costs that are related to sales during the period, consisting primarily of sales commissions earned when contracts are signed. As of January 1, 2018, the date the Company adopted ASC 606, the Company capitalized $239 in contract acquisition costs related to contracts that were not completed. For contracts that have a duration of less than one year, the Company follows ASC 606’s practical expediency, and expenses these costs when incurred; for contracts with life exceeding one year, the Company records these costs in proportion to each completed contract performance obligation. For the three and nine months ended September 30, 2018, the amount of amortization was $0 and $120, respectively, and there was no impairment loss in relation to costs capitalized. Disaggregation of revenue: The following table provides information about disaggregated revenue by primary geographical market, major product line and timing of revenue recognition (in thousands): Nine months ended September 30, 2018 Three months ended September 30, 2018 Licensing and Royalties Total Licensing and Royalties Total Primary geographical markets United States $ 4,667 $ 1,420 $ 6,087 $ 1,483 $ 776 $ 2,259 Europe and Middle East 3,286 8,019 11,305 534 5,605 6,139 Asia Pacific 21,954 17,130 39,084 7,769 5,246 13,015 Total $ 29,907 $ 26,569 $ 56,476 $ 9,786 $ 11,627 $ 21,413 Major product/service lines DSP products (DSP cores and platforms) $ 18,077 $ 24,241 $ 42,318 $ 4,652 $ 10,600 $ 15,252 Connectivity products (Bluetooth, Wi-Fi 11,830 2,328 14,158 5,134 1,027 6,161 Total $ 29,907 $ 26,569 $ 56,476 $ 9,786 $ 11,627 $ 21,413 Timing of revenue recognition Products transferred at a point in time $ 22,163 $ 26,569 $ 48,732 $ 6,878 $ 11,627 $ 18,505 Products and services transferred over time 7,744 — 7,744 2,908 — 2,908 Total $ 29,907 $ 26,569 $ 56,476 $ 9,786 $ 11,627 $ 21,413 Contract balances: The following table provides information about trade receivables, contract assets and contract liabilities from contracts with customers (in thousands): September 30, Trade receivables $ 7,577 Accrued revenues (short-term contract assets) 5,279 Accrued revenues (royalties) 11,177 Deferred revenues (short-term contract liabilities) 3,614 The Company receives payments from customers based upon contractual payment schedules; trade receivable are recorded when the right to consideration becomes unconditional, and an invoice is issued to the customer. Contract assets include amounts related to the Company’s contractual right to consideration for completed performance objectives not yet invoiced. Accrued revenues associated with royalties are recorded as the Company recognizes revenues from royalties earned during the quarter, not yet invoiced, either by actual sales data received from the customers, or, when applicable, by estimation. Contract liabilities (deferred revenue) include payments received in advance of performance under the contract, and are realized with the associated revenue recognized under the contract. During the three and nine months ended September 30, 2018, the Company recognized $253 and $3,676, respectively, that was included in deferred revenues (short-term contract liability) balance at January 1, 2018. In accordance with ASC 606, the disclosure of the impact of adoption to the Company’s condensed consolidated statements of income and balance sheets was as follows: Nine months ended September 30, 2018 Three months ended September 30, 2018 As reported Balance Effect of change higher/(lower) As reported Balance Effect of change higher/(lower) Revenues: Licensing and related revenue $ 29,907 $ 28,730 $ 1,177 $ 9,786 $ 10,131 $ (345 ) Royalties 26,569 24,874 1,695 11,627 7,337 4,290 Total revenues 56,476 53,604 2,872 21,413 17,468 3,945 Cost of revenues 5,966 5,966 — 2,006 2,006 — Gross profit 50,510 47,638 2,872 19,407 15,462 3,945 Operating expenses: Sales and marketing 9,302 9,186 116 2,727 2,729 (2 ) Other operating expenses 44,625 44,625 — 14,528 14,528 — Total operating expenses 53,927 53,811 116 17,255 17,257 (2 ) Operating income (loss) (3,417 ) (6,173 ) 2,756 2,152 (1,795 ) 3,947 Financial income, net 2,535 2,535 — 831 831 — Income (loss) before taxes on income (882 ) (3,638 ) 2,756 2,983 (964 ) 3,947 Income taxes expenses (benefit) 847 657 190 440 (112 ) 552 Net income (loss) $ (1,729 ) $ (4,295 ) $ 2,566 $ 2,543 $ (852 ) $ 3,395 Basic net income (loss) per share $ (0.08 ) $ (0.19 ) $ 0.12 $ 0.12 $ (0.04 ) $ 0.15 Diluted net income (loss) per share $ (0.08 ) $ (0.19 ) $ 0.12 $ 0.11 $ (0.04 ) $ 0.15 September 30, 2018 (unaudited) As reported Balance Effect of change higher/(lower) Assets: Trade receivables $ 7,577 $ 6,718 $ 859 Accrued revenues $ 16,456 $ 5,269 $ 11,187 Prepaid expenses and other current assets $ 5,904 $ 6,856 $ (952 ) Liabilities: Deferred revenues $ 3,614 $ 3,641 $ (27 ) Stockholders’ Equity: Retained earnings $ 60,570 $ 49,449 $ 11,121 Practical Expediency and Exemptions The Company generally expenses sales commissions when incurred because the amortization period would have been less than one year. The Company records these costs within sales and marketing expenses on the Company’s interim condensed consolidated statements of income. The Company does not assess whether a contract has a significant financing component if the expectation at contract inception is such that the period between payment by the customer and the transfer of the promised goods or services to the customer will be one year or less.

MARKETABLE SECURITIES

MARKETABLE SECURITIES	9 Months Ended
	Sep. 30, 2018
Cash and Cash Equivalents [Abstract]
MARKETABLE SECURITIES	NOTE 4: MARKETABLE SECURITIES The following is a summary of available-for-sale September 30, 2018 (Unaudited) Amortized Gross Gross Fair Available-for-sale Corporate bonds $ 8,538 $ — $ (49 ) $ 8,489 8,538 — (49 ) 8,489 Available-for-sale Certificate of deposits 747 — — 747 Government bonds 501 — (11 ) 490 Corporate bonds 70,508 1 (1,452 ) 69,057 71,756 1 (1,463 ) 70,294 Total $ 80,294 $ 1 $ (1,512 ) $ 78,783 December 31, 2017 (Audited) Amortized Gross Gross Fair Available-for-sale Corporate bonds $ 11,803 $ 3 $ (12 ) $ 11,794 11,803 3 (12 ) 11,794 Available-for-sale Certificate of deposits 747 — — 747 Government bonds 501 — (6 ) 495 Corporate bonds 70,291 14 (677 ) 69,628 71,539 14 (683 ) 70,870 Total $ 83,342 $ 17 $ (695 ) $ 82,664 The following table presents gross unrealized losses and fair values for those investments that were in an unrealized loss position as of September 30, 2018 and December 31, 2017, and the length of time that those investments have been in a continuous loss position: Less than 12 months 12 months or greater Fair value Gross Fair value Gross As of September 30, 2018 (unaudited) $ 40,918 $ (615 ) $ 36,817 $ (897 ) As of December 31, 2017 $ 49,921 $ (411 ) $ 22,960 $ (284 ) As of September 30, 2018 and December 31, 2017, management believes the impairments are not other than temporary and therefore the impairment losses were recorded in accumulated other comprehensive income (loss). The following table presents gross realized gains and losses from sale of available-for-sale Nine months ended Three months ended 2018 (unaudited) 2017 (unaudited) 2018 (unaudited) 2017 (unaudited) Gross realized gains from sale of available-for-sale $ 4 $ 14 $ — $ 8 Gross realized losses from sale of available-for-sale $ (34 ) $ (47 ) $ (32 ) $ (1 )

FAIR VALUE MEASUREMENT

FAIR VALUE MEASUREMENT	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENT	NOTE 5: FAIR VALUE MEASUREMENT FASB ASC No. 820, “Fair Value Measurements and Disclosures” defines fair value, establishes a framework for measuring fair value. Fair value is an exit price, representing the amount that would be received for selling an asset or paid for the transfer of a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or a liability. A three-tier fair value hierarchy is established as a basis for considering such assumptions and for inputs used in the valuation methodologies in measuring fair value: Level I Unadjusted quoted prices in active markets that are accessible on the measurement date for identical, unrestricted assets or liabilities; Level II Quoted prices in markets that are not active, or inputs that are observable, either directly or indirectly, for substantially the full term of the asset or liability; and Level III Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable (supported by little or no market activity). The Company measures its marketable securities at fair value. Marketable securities are classified within Level II as the valuation inputs are based on quoted prices and market observable data of similar instruments. The table below sets forth the Company’s assets measured at fair value by level within the fair value hierarchy. Assets are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. Description September 30, 2018 Level I Level II Level III Assets: Marketable securities: Certificate of deposits $ 747 $ — $ 747 $ — Government bonds 490 — 490 — Corporate bonds 77,546 — 77,546 — Description December 31, 2017 Level I Level II Level III Assets: Marketable securities: Certificate of deposits $ 747 $ — $ 747 $ — Government bonds 495 — 495 — Corporate bonds 81,422 — 81,422 —

INTANGIBLE ASSETS, NET

INTANGIBLE ASSETS, NET	9 Months Ended
	Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
INTANGIBLE ASSETS, NET	NOTE 6: INTANGIBLE ASSETS, NET Nine months ended September 30, 2018 Year ended December 31, 2017 Weighted Gross Accumulated Net Gross Accumulated Net Intangible assets –amortizable: Customer relationships 4.5 $ 272 $ 257 $ 15 $ 272 $ 211 $ 61 Customer backlog 1.5 93 93 — 93 93 — Core technologies 5.1 5,796 4,745 1,051 5,796 4,115 1,681 NB-IoT 7.0 2,200 262 1,938 — — — Total intangible assets $ 8,361 $ 5,357 $ 3,004 $ 6,161 $ 4,419 $ 1,742 (*) During the first quarter of 2018, the Company entered into an agreement to acquire certain NB-IoT NB-IoT Future estimated annual amortization charges are as follows: 2018 304 2019 1,155 2020 314 2021 314 2022 314 2023 314 2024 289 $ 3,004

GEOGRAPHIC INFORMATION AND MAJO

GEOGRAPHIC INFORMATION AND MAJOR CUSTOMER DATA	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
GEOGRAPHIC INFORMATION AND MAJOR CUSTOMER DATA	NOTE 7: GEOGRAPHIC INFORMATION AND MAJOR CUSTOMER DATA a. Summary information about geographic areas: The Company manages its business on the basis of one reportable segment: the licensing of intellectual property to semiconductor companies and electronic equipment manufacturers (see Note 1 for a brief description of the Company’s business). The following is a summary of revenues within geographic areas: Nine months ended Three months ended 2018 (unaudited) 2017 (unaudited) 2018 (unaudited) 2017 (unaudited) Revenues based on customer location: United States $ 6,087 $ 6,162 $ 2,259 $ 1,237 Europe and Middle East (1) 11,305 7,451 6,139 1,267 Asia Pacific (2) (3) (4) 39,084 52,293 13,015 21,540 $ 56,476 $ 65,906 $ 21,413 $ 24,044 (1) Germany $ 8,582 * ) $ 5,600 * ) (2) China $ 23,127 $ 31,008 $ 10,192 $ 15,188 (3) S. Korea $ 7,152 $ 13,852 * ) $ 5,076 (4) Japan $ 6,116 * ) * ) * ) *) Less than 10% b. Major customer data as a percentage of total revenues: The following table sets forth the customers that represented 10% or more of the Company’s total revenues in each of the periods set forth below. Nine months ended Three months ended 2018 (unaudited) 2017 (unaudited) 2018 (unaudited) 2017 (unaudited) Customer A 16 % 22 % 16 % 20 % Customer B 12 % 17 % * ) 18 % Customer C 16 % * ) 26 % * ) Customer D * ) * ) * ) 12 % Customer E * ) * ) * ) 21 % *) Less than 10%

NET INCOME (LOSS) PER SHARE OF

NET INCOME (LOSS) PER SHARE OF COMMON STOCK	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
NET INCOME (LOSS) PER SHARE OF COMMON STOCK	NOTE 8: NET INCOME (LOSS) PER SHARE OF COMMON STOCK Basic net income (loss) per share is computed based on the weighted average number of shares of common stock outstanding during each period. Diluted net income (loss) per share is computed based on the weighted average number of shares of common stock outstanding during each period, plus dilutive potential shares of common stock considered outstanding during the period, in accordance with FASB ASC No. 260, “Earnings Per Share.” Nine months ended Three months ended 2018 (unaudited) 2017 (unaudited) 2018 (unaudited) 2017 (unaudited) Numerator: Net income (loss) $ (1,729 ) $ 13,865 $ 2,543 $ 5,850 Denominator (in thousands): Basic weighted-average common stock outstanding 22,091 21,687 21,997 21,946 Effect of stock -based awards — 793 431 737 Diluted weighted average common stock outstanding 22,091 22,480 22,428 22,683 Basic net income (loss) per share $ (0.08 ) $ 0.64 $ 0.12 $ 0.27 Diluted net income (loss) per share $ (0.08 $ 0.62 $ 0.11 $ 0.26 The weighted average number of shares related to outstanding equity-based awards excluded from the calculation of diluted net income per share, since their effect was anti-dilutive, was 136,113 shares for the three months ended September 30, 2018. The total number of shares related to the outstanding equity-based awards excluded from the calculation of diluted net loss per share was 1,273,610 for the nine months ended September 30, 2018. The weighted average number of shares related to outstanding equity-based awards excluded from the calculation of diluted net income per share, since their effect was anti-dilutive, was 0 and 39,856 shares for the three and nine months ended September 30, 2017, respectively.

COMMON STOCK AND STOCK-BASED CO

COMMON STOCK AND STOCK-BASED COMPENSATION PLANS	9 Months Ended
	Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
COMMON STOCK AND STOCK-BASED COMPENSATION PLANS	NOTE 9: COMMON STOCK AND STOCK-BASED COMPENSATION PLANS The Company grants stock options and stock appreciation rights (“SARs”) capped with a ceiling to employees and stock options to non-employee non-employee Number of Weighted Weighted Aggregate Outstanding as of December 31, 2017 729,017 $ 19.77 5.2 $ 19,229 Granted — — Exercised (19,474 ) 16.22 Forfeited or expired (2,128 ) 20.50 Outstanding as of September 30, 2018 (2) 707,415 $ 19.87 4.5 $ 6,447 Exercisable as of September 30, 2018 (3) 610,731 $ 18.96 4.2 $ 6,089 (1) The SAR units are convertible for a maximum number of shares of the Company’s common stock equal to 75% of the SAR units subject to the grant. (2) Due to the ceiling imposed on the SAR grants, the outstanding amount equals a maximum of 645,874 shares of the Company’s common stock issuable upon exercise. (3) Due to the ceiling imposed on the SAR grants, the exercisable amount equals a maximum of 553,861 shares of the Company’s common stock issuable upon exercise. As of September 30, 2018, there was $224 of unrecognized compensation expense related to unvested stock options and SARs. This amount is expected to be recognized over a weighted-average period of 1.2 years. Starting in the second quarter of 2015, the Company granted to employees, including executive officers, and non-employee non-employee non-employee Number of Weighted Average Unvested as of December 31, 2017 560,616 $ 29.31 Granted 304,496 34.83 Vested (268,052 ) 27.73 Forfeited or expired (30,865 ) 35.46 Unvested as of September 30, 2018 566,195 $ 32.70 As of September 30, 2018, there was $13,278 of unrecognized compensation expense related to unvested RSUs. This amount is expected to be recognized over a weighted-average period of 1.5 years. The following table shows the total equity-based compensation expense included in the interim condensed consolidated statements of income: Nine months ended Three months ended 2018 (unaudited) 2017 (unaudited) 2018 (unaudited) 2017 (unaudited) Cost of revenue $ 480 $ 330 $ 155 $ 125 Research and development, net 3,874 2,834 1,246 991 Sales and marketing 1,246 1,040 369 381 General and administrative 2,483 2,142 697 722 Total equity-based compensation expense $ 8,083 $ 6,346 $ 2,467 $ 2,219 The fair value for rights to purchase shares of common stock under the Company’s employee stock purchase plan was estimated on the date of grant using the following assumptions: Nine months ended Three months ended 2018 (unaudited) 2017 (unaudited) 2018 (unaudited) 2017 (unaudited) Expected dividend yield 0 % 0 % 0 % 0 % Expected volatility 35%-42 % 28%-46 % 38 % 28%-43 % Risk-free interest rate 0.7%-2.2 % 0.5%-1.1 % 2.2 % 0.6%-1.1 % Contractual term of up to 24 months 24 months 24 months 24 months

DERIVATIVES AND HEDGING ACTIVIT

DERIVATIVES AND HEDGING ACTIVITIES	9 Months Ended
	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVES AND HEDGING ACTIVITIES	NOTE 10: DERIVATIVES AND HEDGING ACTIVITIES The Company follows the requirements of FASB ASC No. 815,” Derivatives and Hedging” which requires companies to recognize all of their derivative instruments as either assets or liabilities in the statement of financial position at fair value. The accounting for changes in fair value (i.e., gains or losses) of a derivative instrument depends on whether it has been designated and qualifies as part of a hedging transaction and further, on the type of hedging transaction. For those derivative instruments that are designated and qualify as hedging instruments, a company must designate the hedging instrument, based upon the exposure being hedged, as a fair value hedge, cash flow hedge, or a hedge of a net investment in a foreign operation. Due to the Company’s global operations, it is exposed to foreign currency exchange rate fluctuations in the normal course of its business. The Company’s treasury policy allows it to offset the risks associated with the effects of certain foreign currency exposures through the purchase of foreign exchange forward or option contracts (“Hedging Contracts”). The policy, however, prohibits the Company from speculating on such Hedging Contracts for profit. To protect against the increase in value of forecasted foreign currency cash flow resulting from salaries paid in currencies other than the U.S. dollar during the year, the Company instituted a foreign currency cash flow hedging program. The Company hedges portions of the anticipated payroll of its non-U.S. For derivative instruments that are designated and qualify as a cash flow hedge (i.e., hedging the exposure to variability in expected future cash flows that is attributable to a particular risk), the effective portion of the gain or loss on the derivative instrument is reported as a component of other comprehensive income (loss) and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. Any gain or loss on a derivative instrument in excess of the cumulative change in the present value of future cash flows of the hedged item is recognized in current earnings during the period of change. As of September 30, 2018 and December 31, 2017, the notional principal amount of the Hedging Contracts to sell U.S. dollars held by the Company was $4,250 and $0, respectively. The fair value of the Company’s outstanding derivative instruments is as follows: September 30, December 31, 2018 2017 Derivative assets: Derivatives designated as cash flow hedging instruments: Foreign exchange forward contracts $ 11 $ — Total $ 11 $ — Derivative liabilities: Derivatives designated as cash flow hedging instruments: Foreign exchange option contracts $ 11 $ — Total $ 11 $ — The increase (decrease) in unrealized gains (losses) recognized in “accumulated other comprehensive loss” on derivatives, before tax effect, is as follows: Nine months ended Three months ended 2018 (unaudited) 2017 (unaudited) 2018 (unaudited) 2017 (unaudited) Derivatives designated as cash flow hedging instruments: Foreign exchange option contracts $ (128 ) $ 88 $ (2 ) $ 1 Foreign exchange forward contracts (131 ) 92 23 (3 ) $ (259 ) $ 180 $ 21 $ (2 ) The net (gains) losses reclassified from “accumulated other comprehensive loss” into income are as follows: Nine months ended Three months ended 2018 (unaudited) 2017 (unaudited) 2018 (unaudited) 2017 (unaudited) Derivatives designated as cash flow hedging instruments: Foreign exchange option contracts $ 117 $ (88 ) $ 20 $ (1 ) Foreign exchange forward contracts 142 (98 ) 43 3 $ 259 $ (186 ) $ 63 $ 2 The Company recorded in cost of revenues and operating expenses a net loss of $63 and $259 during the three and nine months ended September 30, 2018, respectively, and a net loss of $2 and a net gain of $186 for the comparable periods of 2017, related to its Hedging Contracts.

ACCUMULATED OTHER COMPREHENSIVE

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)	NOTE 11: ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) The following tables summarize the changes in accumulated balances of other comprehensive income (loss), net of taxes: Nine months ended September 30, 2018 Three months ended September 30, 2018 Unrealized gains (losses) on available-for-sale Unrealized Total Unrealized gains (losses) on available-for-sale Unrealized Total Beginning balance $ (586 ) $ — $ (586 ) $ (1,342 ) $ (75 ) $ (1,417 ) Other comprehensive income (loss) before reclassifications (726 ) (232 ) (958 ) 28 18 46 Amounts reclassified from accumulated other comprehensive income (loss) 28 232 260 30 57 87 Net current period other comprehensive income (loss) (698 ) — (698 ) 58 75 133 Ending balance $ (1,284 ) $ — $ (1,284 ) $ (1,284 ) $ — $ (1,284 ) Nine months ended September 30, 2017 Three months ended September 30, 2017 Unrealized gains (losses) on available-for-sale Unrealized Total Unrealized gains (losses) on available-for-sale Unrealized Total Beginning balance $ (502 ) $ 5 $ (497 ) $ (278 ) $ — $ (278 ) Other comprehensive income (loss) before reclassifications 277 161 438 82 (3 ) 79 Amounts reclassified from accumulated other comprehensive income (loss) 24 (166 ) (142 ) (5 ) 3 (2 ) Net current period other comprehensive income (loss) 301 (5 ) 296 77 — 77 Ending balance $ (201 ) $ — $ (201 ) $ (201 ) $ — $ (201 ) The following table provides details about reclassifications out of accumulated other comprehensive income (loss): Details about Accumulated Other Amount Reclassified from Accumulated Other Affected Line Item in the Statements of Nine months ended Three months ended 2018 2017 2018 2017 Unrealized gains (losses) on cash flow hedges $ (5 ) $ 4 $ (1 ) $ — Cost of revenues (225 ) 160 (55 ) (2 ) Research and development (10 ) 10 (3 ) — Sales and marketing (19 ) 12 (4 ) — General and administrative (259 ) 186 (63 ) (2 ) Total, before income taxes (27 ) 20 (6 ) 1 Income tax expense (benefit) (232 ) 166 (57 ) (3 ) Total, net of income taxes Unrealized gains (losses) on available-for-sale (30 ) (33 ) (32 ) 7 Financial income (loss), net (2 ) (9 ) (2 ) 2 Income tax benefit (28 ) (24 ) (30 ) 5 Total, net of income taxes $ (260 ) $ 142 $ (87 ) $ 2 Total, net of income taxes

SHARE REPURCHASE PROGRAM

SHARE REPURCHASE PROGRAM	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
SHARE REPURCHASE PROGRAM	NOTE 12: SHARE REPURCHASE PROGRAM In May 2018, the Company’s Board of Directors authorized the repurchase by the Company of an additional 700,000 shares of common stock pursuant to Rule 10b-18 During the third quarter of 2018, the Company repurchased 216,156 shares of common stock at an average purchase price of $29.18 per share for an aggregate purchase price of $6,308. During the first nine months ended September 30, 2018, the Company repurchased 527,212 shares of common stock at an average purchase price of $31.76 per share for an aggregate purchase price of $16,742. The Company did not repurchase any shares of its common stock during the third quarter and first nine months of 2017. As of September 30, 2018, 483,844 shares of common stock remained available for repurchase pursuant to the Company’s share repurchase program. The repurchases of common stock are accounted for as treasury stock, and result in a reduction of stockholders’ equity. When treasury shares are reissued, the Company accounts for the reissuance in accordance with FASB ASC No. 505-30, paid-in

IMPACT OF RECENTLY ISSUED ACCOU

IMPACT OF RECENTLY ISSUED ACCOUNTING STANDARDS NOT YET ADOPTED	9 Months Ended
	Sep. 30, 2018
Accounting Changes and Error Corrections [Abstract]
IMPACT OF RECENTLY ISSUED ACCOUNTING STANDARDS NOT YET ADOPTED	NOTE 13: IMPACT OF RECENTLY ISSUED ACCOUNTING STANDARDS NOT YET ADOPTED In January 2016, the FASB issued ASU 2016-13, available-for-sale 2016-13 available-for-sale In February 2016, the FASB issued ASU 2016-02, 2016-02 No. 2018-11, In August 2017, the FASB issued ASU 2017-12, 2017-12”), 2017-12 In January 2018, the FASB released guidance on the accounting for tax on the global intangible low-taxed 10-K Effective no later than January 1, 2019, the Company will adopt the accounting standards update that allows for reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the TCJA. The update, which permits early adoption, is effective for annual reporting periods beginning after December 15, 2018, including interim periods within those annual periods. The Company continues to evaluate the requirements and does not expect the adoption to have a material effect on its condensed consolidated statements of financial position, operations and cash flows and on the disclosures contained in the notes to condensed consolidated financial statements.

BASIS OF PRESENTATION AND SUM_2

BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The interim condensed consolidated financial statements have been prepared according to U.S Generally Accepted Accounting Principles (“U.S. GAAP”). The accompanying unaudited interim condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States. In the opinion of management, all adjustments considered necessary for a fair presentation have been included. Operating results for the three and nine months ended September 30, 2018 are not necessarily indicative of the results that may be expected for the year ending December 31, 2018. For further information, reference is made to the consolidated financial statements and footnotes thereto included in the Company’s Annual Report on Form 10K for the year ended December 31, 2017. The significant accounting policies applied in the annual consolidated financial statements of the Company as of December 31, 2017, contained in the Company’s Annual Report on Form 10K filed with the Securities and Exchange Commission on March 1, 2018, have been applied consistently in these unaudited interim condensed consolidated financial statements, except for changes associated with recent accounting standards for revenue recognition and financial instruments for the three and nine months ended September 30, 2018, as detailed below.
Changes in accounting policies as a result of adopting Topic 606 and nature of goods	Changes in accounting policies as a result of adopting Topic 606 and nature of goods Effective as of January 1, 2018, the Company has followed the provisions of Accounting Standards Codification (“ASC”) Topic 606, Revenue from Contracts with Customers The following is a description of principal activities from which the Company generates revenue. Revenues are recognized when control of the promised goods or services are transferred to the customers in an amount that reflects the consideration that the Company expects to receive in exchange for those goods or services. The Company determines revenue recognition through the following steps: • identification of the contract with a customer; • identification of the performance obligations in the contract; • determination of the transaction price; • allocation of the transaction price to the performance obligations in the contract; and • recognition of revenue when, or as, the Company satisfies a performance obligation. The Company enters into contracts that can include various combinations of products and services, as detailed below, which are generally capable of being distinct and accounted for as separate performance obligations. The Company generates its revenues from (1) licensing intellectual properties, which in certain circumstances are modified for customer-specific requirements, (2) royalty revenues, and (3) other revenues, which include revenues from support, training and sale of development systems. The Company accounts for its IP license revenues and related services, which provide the Company’s customers with rights to use the Company’s IP, in accordance with ASC 606. A license may be perpetual or time limited in its application. In accordance with ASC 606, the Company will continue to recognize revenue from IP license at the time of delivery when the customer accepts control of the IP, as the IP is functional without professional services, updates and technical support. The Company has concluded that its IP license is distinct as the customer can benefit from the software on its own. Most of the Company’s contracts with customers contain multiple performance obligations. For these contracts, the Company accounts for individual performance obligations separately, if they are distinct. The transaction price is allocated to the separate performance obligations on a relative standalone selling price basis. Standalone selling prices of IP license are typically estimated using the residual approach. Standalone selling prices of services are typically estimated based on observable transactions when these services are sold on a standalone basis. When contracts involve a significant financing component, the Company adjusts the promised amount of consideration for the effects of the time value of money if the timing of payments agreed to by the parties to the contract (either explicitly or implicitly) provide the customer with a significant benefit of financing, unless the financing period is under one year and only after the products or services were provided, which is a practical expediency permitted under ASC 606. Revenues from contracts that involve significant customization of the Company’s IP to customer-specific specifications are performance obligations the Company generally accounts for as performance obligations satisfied over time. The underlying deliverable is owned and controlled by the customer, and does not create an asset with an alternative use to the Company. The Company recognizes revenue on such contracts using cost based input methods, which recognize revenue and gross profit as work is performed based on a ratio between actual costs incurred compared to the total estimated costs for the contract. Provisions for estimated losses on uncompleted contracts are made during the period in which such losses are first determined, in the amount of the estimated loss on the entire contract. Revenues that are derived from the sale of a licensee’s products that incorporate the Company’s IP are classified as royalty revenues. Royalty revenues are recognized during the quarter in which the sale of the product incorporating the Company’s IP occurs. Royalties are calculated either as a percentage of the revenues received by the Company’s licensees on sales of products incorporating the Company’s IP or on a per unit basis, as specified in the agreements with the licensees. The Company receives the actual sales data from its customers after the quarter ends and accounts for it as accrued revenue. When the Company does not receive actual sales data from the customer prior to the finalization of its financial statements, royalty revenues are recognized based on the Company’s estimation of the customer’s sales during the quarter. In addition to license fees, contracts with customers generally contain an agreement to provide for training and post contract support, which consists of telephone or e-mail Revenues from the sale of development systems are recognized when control of the promised goods or services are transferred to the customers. Deferred revenues, which represent a contract liability, include unearned amounts received under license agreements, unearned technical support and amounts paid by customers not yet recognized as revenues. The Company capitalizes sales commission as costs of obtaining a contract when they are incremental and, if they are expected to be recovered, amortized consistently with the pattern of transfer of the good or service to which the asset relates. If the expected amortization period is one year or less, the commission fee is expensed when incurred.
Changes in accounting policies as a result of adopting ASU No. 2016-01, "Financial Instruments - Recognition and Measurement of Financial Assets and Financial Liabilities"	Changes in accounting policies as a result of adopting ASU No. 2016-01, Beginning on January 1, 2018, the Company has followed the provisions of Accounting Standards Update (“ASU”) No. 2016-01,
Reclassification	Reclassification Certain amounts in the prior years’ financial statements have been reclassified to conform to the current year’s presentation. These amounts are associated with trade receivables and accrued revenues. Such reclassifications have no effect on stockholders’ equity or net income as previously reported.
Use of Estimates	Use of Estimates The preparation of the interim condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates, judgments and assumptions. The Company’s management believes that the estimates, judgments and assumptions used are reasonable based upon information available at the time they are made. These estimates, judgments and assumptions can affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the dates of the interim condensed consolidated financial statements, and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates.
Impact of Recently Issued Accounting Standards Not Yet Adopted	In January 2016, the FASB issued ASU 2016-13, available-for-sale 2016-13 available-for-sale In February 2016, the FASB issued ASU 2016-02, 2016-02 No. 2018-11, In August 2017, the FASB issued ASU 2017-12, 2017-12”), 2017-12 In January 2018, the FASB released guidance on the accounting for tax on the global intangible low-taxed 10-K Effective no later than January 1, 2019, the Company will adopt the accounting standards update that allows for reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the TCJA. The update, which permits early adoption, is effective for annual reporting periods beginning after December 15, 2018, including interim periods within those annual periods. The Company continues to evaluate the requirements and does not expect the adoption to have a material effect on its condensed consolidated statements of financial position, operations and cash flows and on the disclosures contained in the notes to condensed consolidated financial statements.

REVENUE RECOGNITION (Tables)

REVENUE RECOGNITION (Tables)	9 Months Ended
	Sep. 30, 2018
Schedule of Estimated Revenue Expected to be Recognized in Future Related to Performance Obligations	The following table includes estimated revenue expected to be recognized in future periods related to performance obligations that are unsatisfied or partially unsatisfied at the end of the reporting period. The estimated revenues do not include amounts of royalties or unexercised contract renewals: Remainder of 2018 2019 2020 2021 License and related revenues $ 2,256 $ 6,730 $ 3,000 $ 1,500
Summary of Disaggregated Revenue by Primary Geographical Market, Major Product Line and Timing	The following table provides information about disaggregated revenue by primary geographical market, major product line and timing of revenue recognition (in thousands): Nine months ended September 30, 2018 Three months ended September 30, 2018 Licensing and Royalties Total Licensing and Royalties Total Primary geographical markets United States $ 4,667 $ 1,420 $ 6,087 $ 1,483 $ 776 $ 2,259 Europe and Middle East 3,286 8,019 11,305 534 5,605 6,139 Asia Pacific 21,954 17,130 39,084 7,769 5,246 13,015 Total $ 29,907 $ 26,569 $ 56,476 $ 9,786 $ 11,627 $ 21,413 Major product/service lines DSP products (DSP cores and platforms) $ 18,077 $ 24,241 $ 42,318 $ 4,652 $ 10,600 $ 15,252 Connectivity products (Bluetooth, Wi-Fi 11,830 2,328 14,158 5,134 1,027 6,161 Total $ 29,907 $ 26,569 $ 56,476 $ 9,786 $ 11,627 $ 21,413 Timing of revenue recognition Products transferred at a point in time $ 22,163 $ 26,569 $ 48,732 $ 6,878 $ 11,627 $ 18,505 Products and services transferred over time 7,744 — 7,744 2,908 — 2,908 Total $ 29,907 $ 26,569 $ 56,476 $ 9,786 $ 11,627 $ 21,413
Summary of Trade Receivables, Contract Assets and Contract Liabilities from Contracts with Customers	The following table provides information about trade receivables, contract assets and contract liabilities from contracts with customers (in thousands): September 30, Trade receivables $ 7,577 Accrued revenues (short-term contract assets) 5,279 Accrued revenues (royalties) 11,177 Deferred revenues (short-term contract liabilities) 3,614
ASU 2014-09
Schedule of Changes in Accumulated Balances of Other Comprehensive Income (Loss), Net of Taxes	In accordance with ASC 606, the disclosure of the impact of adoption to the Company’s condensed consolidated statements of income and balance sheets was as follows: Nine months ended September 30, 2018 Three months ended September 30, 2018 As reported Balance Effect of change higher/(lower) As reported Balance Effect of change higher/(lower) Revenues: Licensing and related revenue $ 29,907 $ 28,730 $ 1,177 $ 9,786 $ 10,131 $ (345 ) Royalties 26,569 24,874 1,695 11,627 7,337 4,290 Total revenues 56,476 53,604 2,872 21,413 17,468 3,945 Cost of revenues 5,966 5,966 — 2,006 2,006 — Gross profit 50,510 47,638 2,872 19,407 15,462 3,945 Operating expenses: Sales and marketing 9,302 9,186 116 2,727 2,729 (2 ) Other operating expenses 44,625 44,625 — 14,528 14,528 — Total operating expenses 53,927 53,811 116 17,255 17,257 (2 ) Operating income (loss) (3,417 ) (6,173 ) 2,756 2,152 (1,795 ) 3,947 Financial income, net 2,535 2,535 — 831 831 — Income (loss) before taxes on income (882 ) (3,638 ) 2,756 2,983 (964 ) 3,947 Income taxes expenses (benefit) 847 657 190 440 (112 ) 552 Net income (loss) $ (1,729 ) $ (4,295 ) $ 2,566 $ 2,543 $ (852 ) $ 3,395 Basic net income (loss) per share $ (0.08 ) $ (0.19 ) $ 0.12 $ 0.12 $ (0.04 ) $ 0.15 Diluted net income (loss) per share $ (0.08 ) $ (0.19 ) $ 0.12 $ 0.11 $ (0.04 ) $ 0.15 September 30, 2018 (unaudited) As reported Balance Effect of change higher/(lower) Assets: Trade receivables $ 7,577 $ 6,718 $ 859 Accrued revenues $ 16,456 $ 5,269 $ 11,187 Prepaid expenses and other current assets $ 5,904 $ 6,856 $ (952 ) Liabilities: Deferred revenues $ 3,614 $ 3,641 $ (27 ) Stockholders’ Equity: Retained earnings $ 60,570 $ 49,449 $ 11,121

MARKETABLE SECURITIES (Tables)

MARKETABLE SECURITIES (Tables)	9 Months Ended
	Sep. 30, 2018
Cash and Cash Equivalents [Abstract]
Summary of Available-for-Sale Marketable Securities	The following is a summary of available-for-sale September 30, 2018 (Unaudited) Amortized Gross Gross Fair Available-for-sale Corporate bonds $ 8,538 $ — $ (49 ) $ 8,489 8,538 — (49 ) 8,489 Available-for-sale Certificate of deposits 747 — — 747 Government bonds 501 — (11 ) 490 Corporate bonds 70,508 1 (1,452 ) 69,057 71,756 1 (1,463 ) 70,294 Total $ 80,294 $ 1 $ (1,512 ) $ 78,783 December 31, 2017 (Audited) Amortized Gross Gross Fair Available-for-sale Corporate bonds $ 11,803 $ 3 $ (12 ) $ 11,794 11,803 3 (12 ) 11,794 Available-for-sale Certificate of deposits 747 — — 747 Government bonds 501 — (6 ) 495 Corporate bonds 70,291 14 (677 ) 69,628 71,539 14 (683 ) 70,870 Total $ 83,342 $ 17 $ (695 ) $ 82,664
Summary of Gross Unrealized Losses and Fair Values on Investments	The following table presents gross unrealized losses and fair values for those investments that were in an unrealized loss position as of September 30, 2018 and December 31, 2017, and the length of time that those investments have been in a continuous loss position: Less than 12 months 12 months or greater Fair value Gross Fair value Gross As of September 30, 2018 (unaudited) $ 40,918 $ (615 ) $ 36,817 $ (897 ) As of December 31, 2017 $ 49,921 $ (411 ) $ 22,960 $ (284 )
Summary of Gross Realized Gains and Losses from Sale of Available-for-Sale Marketable Securities	The following table presents gross realized gains and losses from sale of available-for-sale Nine months ended Three months ended 2018 (unaudited) 2017 (unaudited) 2018 (unaudited) 2017 (unaudited) Gross realized gains from sale of available-for-sale $ 4 $ 14 $ — $ 8 Gross realized losses from sale of available-for-sale $ (34 ) $ (47 ) $ (32 ) $ (1 )

FAIR VALUE MEASUREMENT (Tables)

FAIR VALUE MEASUREMENT (Tables)	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurement	The table below sets forth the Company’s assets measured at fair value by level within the fair value hierarchy. Assets are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. Description September 30, 2018 Level I Level II Level III Assets: Marketable securities: Certificate of deposits $ 747 $ — $ 747 $ — Government bonds 490 — 490 — Corporate bonds 77,546 — 77,546 — Description December 31, 2017 Level I Level II Level III Assets: Marketable securities: Certificate of deposits $ 747 $ — $ 747 $ — Government bonds 495 — 495 — Corporate bonds 81,422 — 81,422 —

INTANGIBLE ASSETS, NET (Tables)

INTANGIBLE ASSETS, NET (Tables)	9 Months Ended
	Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Intangible Assets	Nine months ended September 30, 2018 Year ended December 31, 2017 Weighted Gross Accumulated Net Gross Accumulated Net Intangible assets –amortizable: Customer relationships 4.5 $ 272 $ 257 $ 15 $ 272 $ 211 $ 61 Customer backlog 1.5 93 93 — 93 93 — Core technologies 5.1 5,796 4,745 1,051 5,796 4,115 1,681 NB-IoT 7.0 2,200 262 1,938 — — — Total intangible assets $ 8,361 $ 5,357 $ 3,004 $ 6,161 $ 4,419 $ 1,742 (*) During the first quarter of 2018, the Company entered into an agreement to acquire certain NB-IoT NB-IoT
Summary of Future Estimated Annual Amortization Charges	Future estimated annual amortization charges are as follows: 2018 304 2019 1,155 2020 314 2021 314 2022 314 2023 314 2024 289 $ 3,004

GEOGRAPHIC INFORMATION AND MA_2

GEOGRAPHIC INFORMATION AND MAJOR CUSTOMER DATA (Tables)	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
Revenues Based on Customer Location	The following is a summary of revenues within geographic areas: Nine months ended Three months ended 2018 (unaudited) 2017 (unaudited) 2018 (unaudited) 2017 (unaudited) Revenues based on customer location: United States $ 6,087 $ 6,162 $ 2,259 $ 1,237 Europe and Middle East (1) 11,305 7,451 6,139 1,267 Asia Pacific (2) (3) (4) 39,084 52,293 13,015 21,540 $ 56,476 $ 65,906 $ 21,413 $ 24,044 (1) Germany $ 8,582 * ) $ 5,600 * ) (2) China $ 23,127 $ 31,008 $ 10,192 $ 15,188 (3) S. Korea $ 7,152 $ 13,852 * ) $ 5,076 (4) Japan $ 6,116 * ) * ) * ) *) Less than 10%
Major Customers Data as Percentage of Total Revenues	The following table sets forth the customers that represented 10% or more of the Company’s total revenues in each of the periods set forth below. Nine months ended Three months ended 2018 (unaudited) 2017 (unaudited) 2018 (unaudited) 2017 (unaudited) Customer A 16 % 22 % 16 % 20 % Customer B 12 % 17 % * ) 18 % Customer C 16 % * ) 26 % * ) Customer D * ) * ) * ) 12 % Customer E * ) * ) * ) 21 % *) Less than 10%

NET INCOME (LOSS) PER SHARE O_2

NET INCOME (LOSS) PER SHARE OF COMMON STOCK (Tables)	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Calculation of Basic and Diluted Net Income (Loss) Per Share	Diluted net income (loss) per share is computed based on the weighted average number of shares of common stock outstanding during each period, plus dilutive potential shares of common stock considered outstanding during the period, in accordance with FASB ASC No. 260, “Earnings Per Share.” Nine months ended Three months ended 2018 (unaudited) 2017 (unaudited) 2018 (unaudited) 2017 (unaudited) Numerator: Net income (loss) $ (1,729 ) $ 13,865 $ 2,543 $ 5,850 Denominator (in thousands): Basic weighted-average common stock outstanding 22,091 21,687 21,997 21,946 Effect of stock -based awards — 793 431 737 Diluted weighted average common stock outstanding 22,091 22,480 22,428 22,683 Basic net income (loss) per share $ (0.08 ) $ 0.64 $ 0.12 $ 0.27 Diluted net income (loss) per share $ (0.08 $ 0.62 $ 0.11 $ 0.26

COMMON STOCK AND STOCK-BASED _2

COMMON STOCK AND STOCK-BASED COMPENSATION PLANS (Tables)	9 Months Ended
	Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Stock Option Activity	A summary of the Company’s stock option and SARs activities and related information for the nine months ended September 30, 2018, are as follows: Number of Weighted Weighted Aggregate Outstanding as of December 31, 2017 729,017 $ 19.77 5.2 $ 19,229 Granted — — Exercised (19,474 ) 16.22 Forfeited or expired (2,128 ) 20.50 Outstanding as of September 30, 2018 (2) 707,415 $ 19.87 4.5 $ 6,447 Exercisable as of September 30, 2018 (3) 610,731 $ 18.96 4.2 $ 6,089 (1) The SAR units are convertible for a maximum number of shares of the Company’s common stock equal to 75% of the SAR units subject to the grant. (2) Due to the ceiling imposed on the SAR grants, the outstanding amount equals a maximum of 645,874 shares of the Company’s common stock issuable upon exercise. (3) Due to the ceiling imposed on the SAR grants, the exercisable amount equals a maximum of 553,861 shares of the Company’s common stock issuable upon exercise.
Summary of Restricted Stock Units Activity	A summary of the Company’s RSU activities and related information for the nine months ended September 30, 2018, are as follows: Number of Weighted Average Unvested as of December 31, 2017 560,616 $ 29.31 Granted 304,496 34.83 Vested (268,052 ) 27.73 Forfeited or expired (30,865 ) 35.46 Unvested as of September 30, 2018 566,195 $ 32.70
Equity-Based Compensation Expense Included in Interim Condensed Consolidated Statements of Income	The following table shows the total equity-based compensation expense included in the interim condensed consolidated statements of income: Nine months ended Three months ended 2018 (unaudited) 2017 (unaudited) 2018 (unaudited) 2017 (unaudited) Cost of revenue $ 480 $ 330 $ 155 $ 125 Research and development, net 3,874 2,834 1,246 991 Sales and marketing 1,246 1,040 369 381 General and administrative 2,483 2,142 697 722 Total equity-based compensation expense $ 8,083 $ 6,346 $ 2,467 $ 2,219
Assumptions Used to Estimate Fair Value of Employee Stock Purchase Plan	The fair value for rights to purchase shares of common stock under the Company’s employee stock purchase plan was estimated on the date of grant using the following assumptions: Nine months ended Three months ended 2018 (unaudited) 2017 (unaudited) 2018 (unaudited) 2017 (unaudited) Expected dividend yield 0 % 0 % 0 % 0 % Expected volatility 35%-42 % 28%-46 % 38 % 28%-43 % Risk-free interest rate 0.7%-2.2 % 0.5%-1.1 % 2.2 % 0.6%-1.1 % Contractual term of up to 24 months 24 months 24 months 24 months

DERIVATIVES AND HEDGING ACTIV_2

DERIVATIVES AND HEDGING ACTIVITIES (Tables)	9 Months Ended
	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Value of Outstanding Derivative Instruments	The fair value of the Company’s outstanding derivative instruments is as follows: September 30, December 31, 2018 2017 Derivative assets: Derivatives designated as cash flow hedging instruments: Foreign exchange forward contracts $ 11 $ — Total $ 11 $ — Derivative liabilities: Derivatives designated as cash flow hedging instruments: Foreign exchange option contracts $ 11 $ — Total $ 11 $ —
Increase (Decrease) in Unrealized Gains (Losses) Recognized in "Accumulated Other Comprehensive Loss" on Derivatives, Before Tax Effect	The increase (decrease) in unrealized gains (losses) recognized in “accumulated other comprehensive loss” on derivatives, before tax effect, is as follows: Nine months ended Three months ended 2018 (unaudited) 2017 (unaudited) 2018 (unaudited) 2017 (unaudited) Derivatives designated as cash flow hedging instruments: Foreign exchange option contracts $ (128 ) $ 88 $ (2 ) $ 1 Foreign exchange forward contracts (131 ) 92 23 (3 ) $ (259 ) $ 180 $ 21 $ (2 )
Net (Gains) Losses Reclassified from "Accumulated Other Comprehensive Loss"	The net (gains) losses reclassified from “accumulated other comprehensive loss” into income are as follows: Nine months ended Three months ended 2018 (unaudited) 2017 (unaudited) 2018 (unaudited) 2017 (unaudited) Derivatives designated as cash flow hedging instruments: Foreign exchange option contracts $ 117 $ (88 ) $ 20 $ (1 ) Foreign exchange forward contracts 142 (98 ) 43 3 $ 259 $ (186 ) $ 63 $ 2

ACCUMULATED OTHER COMPREHENSI_2

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables)	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Changes in Accumulated Balances of Other Comprehensive Income (Loss), Net of Tax	The following tables summarize the changes in accumulated balances of other comprehensive income (loss), net of taxes: Nine months ended September 30, 2018 Three months ended September 30, 2018 Unrealized gains (losses) on available-for-sale Unrealized Total Unrealized gains (losses) on available-for-sale Unrealized Total Beginning balance $ (586 ) $ — $ (586 ) $ (1,342 ) $ (75 ) $ (1,417 ) Other comprehensive income (loss) before reclassifications (726 ) (232 ) (958 ) 28 18 46 Amounts reclassified from accumulated other comprehensive income (loss) 28 232 260 30 57 87 Net current period other comprehensive income (loss) (698 ) — (698 ) 58 75 133 Ending balance $ (1,284 ) $ — $ (1,284 ) $ (1,284 ) $ — $ (1,284 ) Nine months ended September 30, 2017 Three months ended September 30, 2017 Unrealized gains (losses) on available-for-sale Unrealized Total Unrealized gains (losses) on available-for-sale Unrealized Total Beginning balance $ (502 ) $ 5 $ (497 ) $ (278 ) $ — $ (278 ) Other comprehensive income (loss) before reclassifications 277 161 438 82 (3 ) 79 Amounts reclassified from accumulated other comprehensive income (loss) 24 (166 ) (142 ) (5 ) 3 (2 ) Net current period other comprehensive income (loss) 301 (5 ) 296 77 — 77 Ending balance $ (201 ) $ — $ (201 ) $ (201 ) $ — $ (201 )
Details about Reclassification out of Accumulated Other Comprehensive Income Components	The following table provides details about reclassifications out of accumulated other comprehensive income (loss): Details about Accumulated Other Amount Reclassified from Accumulated Other Affected Line Item in the Statements of Nine months ended Three months ended 2018 2017 2018 2017 Unrealized gains (losses) on cash flow hedges $ (5 ) $ 4 $ (1 ) $ — Cost of revenues (225 ) 160 (55 ) (2 ) Research and development (10 ) 10 (3 ) — Sales and marketing (19 ) 12 (4 ) — General and administrative (259 ) 186 (63 ) (2 ) Total, before income taxes (27 ) 20 (6 ) 1 Income tax expense (benefit) (232 ) 166 (57 ) (3 ) Total, net of income taxes Unrealized gains (losses) on available-for-sale (30 ) (33 ) (32 ) 7 Financial income (loss), net (2 ) (9 ) (2 ) 2 Income tax benefit (28 ) (24 ) (30 ) 5 Total, net of income taxes $ (260 ) $ 142 $ (87 ) $ 2 Total, net of income taxes

Revenue Recognition- Additional

Revenue Recognition- Additional Information (Detail) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Jan. 01, 2018
Deferred Revenue
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred revenues (Short-term contract liability)	$ 253,000	$ 3,676,000
ASU 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Impact to revenues and operating income (loss)	3,945,000	2,872,000
Capitalized contract acquisition costs			$ 239,000
Capitalized contract cost, amortization	0	120,000
Impairment loss in relation to costs capitalized		0
ASU 2014-09 | Accrued Revenues
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New accounting pronouncement or change in accounting principle cumulative effect of change on equity or net assets	$ 10,787,000	$ 10,787,000
ASU 2014-09 | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New accounting pronouncement or change in accounting principle cumulative effect of change on equity or net assets			$ 8,555,000

Schedule of Estimated Revenue E

Schedule of Estimated Revenue Expected to be Recognized in Future Related to Performance Obligations (Detail) $ in Thousands	Sep. 30, 2018USD ($)
Remainder of 2018
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue remaining performance obligation	$ 2,256
2,019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue remaining performance obligation	6,730
2,020
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue remaining performance obligation	3,000
2,021
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue remaining performance obligation	$ 1,500

Summary of Disaggregated Revenu

Summary of Disaggregated Revenue by Primary Geographical Market, Major Product Line and Timing (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Revenues	$ 21,413	$ 24,044	$ 56,476	$ 65,906
Licensing and Related Revenue
Disaggregation of Revenue [Line Items]
Revenues	9,786	14,021	29,907	33,893
Royalties
Disaggregation of Revenue [Line Items]
Revenues	11,627	10,023	26,569	32,013
Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenues	18,505		48,732
Transferred at Point in Time | Licensing and Related Revenue
Disaggregation of Revenue [Line Items]
Revenues	6,878		22,163
Transferred at Point in Time | Royalties
Disaggregation of Revenue [Line Items]
Revenues	11,627		26,569
Transferred over Time
Disaggregation of Revenue [Line Items]
Revenues	2,908		7,744
Transferred over Time | Licensing and Related Revenue
Disaggregation of Revenue [Line Items]
Revenues	2,908		7,744
DSP Products
Disaggregation of Revenue [Line Items]
Revenues	15,252		42,318
DSP Products | Licensing and Related Revenue
Disaggregation of Revenue [Line Items]
Revenues	4,652		18,077
DSP Products | Royalties
Disaggregation of Revenue [Line Items]
Revenues	10,600		24,241
Connectivity Products
Disaggregation of Revenue [Line Items]
Revenues	6,161		14,158
Connectivity Products | Licensing and Related Revenue
Disaggregation of Revenue [Line Items]
Revenues	5,134		11,830
Connectivity Products | Royalties
Disaggregation of Revenue [Line Items]
Revenues	1,027		2,328
United States
Disaggregation of Revenue [Line Items]
Revenues	2,259	1,237	6,087	6,162
United States | Licensing and Related Revenue
Disaggregation of Revenue [Line Items]
Revenues	1,483		4,667
United States | Royalties
Disaggregation of Revenue [Line Items]
Revenues	776		1,420
Europe and Middle East
Disaggregation of Revenue [Line Items]
Revenues	6,139	1,267	11,305	7,451
Europe and Middle East | Licensing and Related Revenue
Disaggregation of Revenue [Line Items]
Revenues	534		3,286
Europe and Middle East | Royalties
Disaggregation of Revenue [Line Items]
Revenues	5,605		8,019
Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	13,015	$ 21,540	39,084	$ 52,293
Asia Pacific | Licensing and Related Revenue
Disaggregation of Revenue [Line Items]
Revenues	7,769		21,954
Asia Pacific | Royalties
Disaggregation of Revenue [Line Items]
Revenues	$ 5,246		$ 17,130

Schedule of Trade Receivables,

Schedule of Trade Receivables, Contract Assets and Contract Liabilities from Contracts with Customers (Detail) $ in Thousands	Sep. 30, 2018USD ($)
Trade Receivables
Contract with Customer Asset and Liability [Line Items]
Contract with customer asset, balance	$ 7,577
Accrued Revenues
Contract with Customer Asset and Liability [Line Items]
Contract with customer asset, balance	5,279
Accrued Revenues | Royalties
Contract with Customer Asset and Liability [Line Items]
Contract with customer asset, balance	11,177
Deferred Revenue
Contract with Customer Asset and Liability [Line Items]
Contract with customer liability, balance	$ 3,614

Schedule of Changes in Accumula

Schedule of Changes in Accumulated Balances of Other Comprehensive Income (Loss), Net of Taxes (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Revenues:
Revenues	$ 21,413	$ 24,044	$ 56,476	$ 65,906
Cost of revenues	2,006	1,726	5,966	5,030
Gross profit	19,407	22,318	50,510	60,876
Operating expenses:
Sales and marketing	2,727	3,057	9,302	9,422
Other operating expenses	14,528		44,625
Total operating expenses	17,255	16,108	53,927	48,150
Operating income (loss)	2,152	6,210	(3,417)	12,726
Financial income, net	831	821	2,535	2,147
Income (loss) before taxes on income	2,983	7,031	(882)	14,873
Income taxes expenses (benefit)	440	1,181	847	1,008
Net income (loss)	$ 2,543	$ 5,850	$ (1,729)	$ 13,865
Basic net income (loss) per share	$ 0.12	$ 0.27	$ (0.08)	$ 0.64
Diluted net income (loss) per share	$ 0.11	$ 0.26	$ (0.08)	$ 0.62
Assets:
Trade receivables	$ 7,577		$ 7,577		$ 14,480
Accrued revenues	16,456		16,456		2,014
Prepaid expenses and other current assets	5,904		5,904		3,747
Liabilities:
Deferred revenues	3,614		3,614		4,399
Stockholders' equity:
Retained earnings	60,570		60,570		$ 53,873
Licensing and Related Revenue
Revenues:
Revenues	9,786	$ 14,021	29,907	$ 33,893
Royalties
Revenues:
Revenues	11,627	$ 10,023	26,569	$ 32,013
Calculated under Revenue Guidance in Effect before Topic 606 | ASU 2014-09
Revenues:
Revenues	17,468		53,604
Cost of revenues	2,006		5,966
Gross profit	15,462		47,638
Operating expenses:
Sales and marketing	2,729		9,186
Other operating expenses	14,528		44,625
Total operating expenses	17,257		53,811
Operating income (loss)	(1,795)		(6,173)
Financial income, net	831		2,535
Income (loss) before taxes on income	(964)		(3,638)
Income taxes expenses (benefit)	(112)		657
Net income (loss)	$ (852)		$ (4,295)
Basic net income (loss) per share	$ (0.04)		$ (0.19)
Diluted net income (loss) per share	$ (0.04)		$ (0.19)
Assets:
Trade receivables	$ 6,718		$ 6,718
Accrued revenues	5,269		5,269
Prepaid expenses and other current assets	6,856		6,856
Liabilities:
Deferred revenues	3,641		3,641
Stockholders' equity:
Retained earnings	49,449		49,449
Calculated under Revenue Guidance in Effect before Topic 606 | ASU 2014-09 | Licensing and Related Revenue
Revenues:
Revenues	10,131		28,730
Calculated under Revenue Guidance in Effect before Topic 606 | ASU 2014-09 | Royalties
Revenues:
Revenues	7,337		24,874
Effect of change higher/(lower) | ASU 2014-09
Revenues:
Revenues	3,945		2,872
Gross profit	3,945		2,872
Operating expenses:
Sales and marketing	(2)		116
Total operating expenses	(2)		116
Operating income (loss)	3,947		2,756
Income (loss) before taxes on income	3,947		2,756
Income taxes expenses (benefit)	552		190
Net income (loss)	$ 3,395		$ 2,566
Basic net income (loss) per share	$ 0.15		$ 0.12
Diluted net income (loss) per share	$ 0.15		$ 0.12
Assets:
Trade receivables	$ 859		$ 859
Accrued revenues	11,187		11,187
Prepaid expenses and other current assets	(952)		(952)
Liabilities:
Deferred revenues	(27)		(27)
Stockholders' equity:
Retained earnings	11,121		11,121
Effect of change higher/(lower) | ASU 2014-09 | Licensing and Related Revenue
Revenues:
Revenues	(345)		1,177
Effect of change higher/(lower) | ASU 2014-09 | Royalties
Revenues:
Revenues	$ 4,290		$ 1,695

Summary of Available-for-Sale M

Summary of Available-for-Sale Marketable Securities (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Available-for-sale - matures within one year, Amortized cost	$ 8,538	$ 11,803
Available-for-sale - matures within one year through five years, Amortized cost	71,756	71,539
Amortized cost, Total	80,294	83,342
Available-for-sale - matures within one year, Gross unrealized gains		3
Available-for-sale - matures after one year through five years, Gross unrealized gains	1	14
Gross unrealized gains, Total	1	17
Available-for-sale - matures within one year, Gross unrealized losses	(49)	(12)
Available-for-sale - matures after one year through five years, Gross unrealized losses	(1,463)	(683)
Gross unrealized losses, Total	(1,512)	(695)
Available-for-sale - matures within one year, Fair value	8,489	11,794
Available-for-sale - matures after one year through five years, Fair value	70,294	70,870
Fair value, Total	78,783	82,664
Certificates of deposits
Debt Securities, Available-for-sale [Line Items]
Available-for-sale - matures within one year through five years, Amortized cost	747	747
Available-for-sale - matures after one year through five years, Fair value	747	747
Fair value, Total	747	747
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Available-for-sale - matures within one year, Amortized cost	8,538	11,803
Available-for-sale - matures within one year through five years, Amortized cost	70,508	70,291
Available-for-sale - matures within one year, Gross unrealized gains		3
Available-for-sale - matures after one year through five years, Gross unrealized gains	1	14
Available-for-sale - matures within one year, Gross unrealized losses	(49)	(12)
Available-for-sale - matures after one year through five years, Gross unrealized losses	(1,452)	(677)
Available-for-sale - matures within one year, Fair value	8,489	11,794
Available-for-sale - matures after one year through five years, Fair value	69,057	69,628
Government bonds
Debt Securities, Available-for-sale [Line Items]
Available-for-sale - matures within one year through five years, Amortized cost	501	501
Available-for-sale - matures after one year through five years, Gross unrealized losses	(11)	(6)
Available-for-sale - matures after one year through five years, Fair value	490	495
Fair value, Total	$ 490	$ 495

Summary of Gross Unrealized Los

Summary of Gross Unrealized Losses and Fair Values on Investments (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Less than 12 months, Fair value	$ 40,918	$ 49,921
Less than 12 months, Gross unrealized loss	(615)	(411)
12 months or greater, Fair value	36,817	22,960
12 months or greater, Gross unrealized loss	$ (897)	$ (284)

Summary of Gross Realized Gains

Summary of Gross Realized Gains and Losses from Sale of Available-for-Sale Marketable Securities (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Gross realized gains from sale of available-for-sale marketable securities		$ 8	$ 4	$ 14
Gross realized losses from sale of available-for-sale marketable securities	$ (32)	$ (1)	$ (34)	$ (47)

Fair Value Measurement (Detail)

Fair Value Measurement (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets:
Marketable securities	$ 78,783	$ 82,664
Government bonds
Assets:
Marketable securities	490	495
Certificates of deposits
Assets:
Marketable securities	747	747
Corporate bonds
Assets:
Marketable securities	77,546	81,422
Level II | Government bonds
Assets:
Marketable securities	490	495
Level II | Certificates of deposits
Assets:
Marketable securities	747	747
Level II | Corporate bonds
Assets:
Marketable securities	$ 77,546	$ 81,422

Summary of Intangible Assets (D

Summary of Intangible Assets (Detail) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Total intangible assets, Gross Carrying Amount		$ 8,361	$ 6,161
Total intangible assets, Accumulated Amortization		5,357	4,419
Total intangible assets, Net		$ 3,004	1,742
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Total intangible assets, Weighted Average Amortization Period (Years)		4 years 6 months
Total intangible assets, Gross Carrying Amount		$ 272	272
Total intangible assets, Accumulated Amortization		257	211
Total intangible assets, Net		$ 15	61
Customer backlog
Finite-Lived Intangible Assets [Line Items]
Total intangible assets, Weighted Average Amortization Period (Years)		1 year 6 months
Total intangible assets, Gross Carrying Amount		$ 93	93
Total intangible assets, Accumulated Amortization		$ 93	93
Core technologies
Finite-Lived Intangible Assets [Line Items]
Total intangible assets, Weighted Average Amortization Period (Years)		5 years 1 month 6 days
Total intangible assets, Gross Carrying Amount		$ 5,796	5,796
Total intangible assets, Accumulated Amortization		4,745	4,115
Total intangible assets, Net		$ 1,051	$ 1,681
NB-IoT technologies
Finite-Lived Intangible Assets [Line Items]
Total intangible assets, Weighted Average Amortization Period (Years)	[1]	7 years
Total intangible assets, Gross Carrying Amount	[1]	$ 2,200
Total intangible assets, Accumulated Amortization	[1]	262
Total intangible assets, Net	[1]	$ 1,938
[1]	During the first quarter of 2018, the Company entered into an agreement to acquire certain NB-IoT technologies in the amount of $2,800, of which $600 has not been received. Of the $2,200, $750 has not resulted in cash outflows as of September 30, 2018. The Company recorded the amortization cost of the NB-IoT technologies in "cost of revenues" on the Company's interim condensed consolidated statements of income.

Summary of Intangible Assets (P

Summary of Intangible Assets (Parenthetical) (Detail) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Finite lived intangible assets, gross		$ 8,361	$ 6,161
Intangible assets purchases incurred but unpaid at period end		750
NB-IoT technologies
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, acquired		2,800
Finite-lived intangible assets, balance not received		600
Finite lived intangible assets, gross	[1]	2,200
Intangible assets purchases incurred but unpaid at period end		$ 750
[1]	During the first quarter of 2018, the Company entered into an agreement to acquire certain NB-IoT technologies in the amount of $2,800, of which $600 has not been received. Of the $2,200, $750 has not resulted in cash outflows as of September 30, 2018. The Company recorded the amortization cost of the NB-IoT technologies in "cost of revenues" on the Company's interim condensed consolidated statements of income.

Summary of Future Estimated Ann

Summary of Future Estimated Annual Amortization Charges (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2,018	$ 304
2,019	1,155
2,020	314
2,021	314
2,022	314
2,023	314
2,024	289
Total intangible assets, Net	$ 3,004	$ 1,742

Revenues Based on Customer Loca

Revenues Based on Customer Location (Detail) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2018		Sep. 30, 2017		Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Revenues	$ 21,413		$ 24,044		$ 56,476	$ 65,906
United States
Segment Reporting Information [Line Items]
Revenues	2,259		1,237		6,087	6,162
Europe and Middle East
Segment Reporting Information [Line Items]
Revenues	6,139		1,267		11,305	7,451
Asia Pacific
Segment Reporting Information [Line Items]
Revenues	13,015		21,540		39,084	52,293
China
Segment Reporting Information [Line Items]
Revenues	10,192		15,188		23,127	31,008
S. Korea
Segment Reporting Information [Line Items]
Revenues		[1]	5,076		7,152	13,852
Germany
Segment Reporting Information [Line Items]
Revenues	5,600			[1]	8,582		[1]
Japan
Segment Reporting Information [Line Items]
Revenues		[1]		[1]	$ 6,116		[1]
[1]	Less than 10%

Major Customers Data as Percent

Major Customers Data as Percentage of Total Revenues (Detail) - Revenue - Customer Concentration Risk	3 Months Ended				9 Months Ended
	Sep. 30, 2018		Sep. 30, 2017		Sep. 30, 2018		Sep. 30, 2017
Customer A
Revenue, Major Customer [Line Items]
Percentage of total revenues	16.00%		20.00%		16.00%		22.00%
Customer B
Revenue, Major Customer [Line Items]
Percentage of total revenues		[1]	18.00%		12.00%		17.00%
Customer C
Revenue, Major Customer [Line Items]
Percentage of total revenues	26.00%			[1]	16.00%			[1]
Customer D
Revenue, Major Customer [Line Items]
Percentage of total revenues		[1]	12.00%			[1]		[1]
Customer E
Revenue, Major Customer [Line Items]
Percentage of total revenues		[1]	21.00%			[1]		[1]
[1]	Less than 10%

Calculation of Basic and Dilute

Calculation of Basic and Diluted Net Income (Loss) Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Numerator:
Net income (loss)	$ 2,543	$ 5,850	$ (1,729)	$ 13,865
Denominator (in thousands):
Basic weighted-average common stock outstanding	21,997	21,946	22,091	21,687
Effect of stock -based awards	431	737		793
Diluted weighted average common stock outstanding	22,428	22,683	22,091	22,480
Basic net income (loss) per share	$ 0.12	$ 0.27	$ (0.08)	$ 0.64
Diluted net income (loss) per share	$ 0.11	$ 0.26	$ (0.08)	$ 0.62

Net Income (Loss) Per Share o_3

Net Income (Loss) Per Share of Common Stock - Additional Information (Detail) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share [Abstract]
Antidilutive shares excluded from computation of earnings per share	136,113	0	1,273,610	39,856

Common Stock and Stock-Based _3

Common Stock and Stock-Based Compensation Plans - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
2011 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options and stock appreciation rights granted under stock incentive plans vesting rate, year one	25.00%
Remaining shares vesting period	36 months
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares vesting period	4 years
Stock Appreciation Rights (SARs) | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted percentage	400.00%
Stock Options, SARs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	$ 224
Unrecognized compensation expense, weighted-average period of recognition	1 year 2 months 12 days
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	$ 13,278
Unrecognized compensation expense, weighted-average period of recognition	1 year 6 months
Employees and non-employees award vesting, description	RSUs granted to employees generally vest in three equal annual installments starting on the first anniversary of the grant date. Until the end of 2017, RSUs granted to non-employee directors would generally vest in full on the first anniversary of the grant date. Starting in 2018, RSUs granted to non-employee directors would generally vest in two equal annual installments starting on the first anniversary of the grant date.
Non Employee Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted under stock incentive plan vesting rate, each anniversary	25.00%
Non Employee Director | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares vesting period	2 years	1 year
Employee | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares vesting period	3 years

Summary of Stock Option Activit

Summary of Stock Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands		9 Months Ended		12 Months Ended
		Sep. 30, 2018		Dec. 31, 2017
Number of options and SAR units
Number of shares outstanding, Beginning balance	[1]	729,017
Number of shares, Options/SAR units granted	[1]	0
Number of shares, Options/SAR units exercised	[1]	(19,474)
Number of shares, Options/SAR units forfeited or expired	[1]	(2,128)
Number of shares outstanding, Ending balance	[1]	707,415	[2]	729,017
Number of shares exercisable, Ending balance	[1],[3]	610,731
Weighted-average exercise price
Weighted-average exercise price, Beginning balance		$ 19.77
Weighted average exercise price, Granted		0
Weighted average exercise price, Exercised		16.22
Weighted average exercise price, Forfeited or expired		20.50
Weighted average exercise price, Ending balance		19.87	[2]	$ 19.77
Weighted average exercise price, exercisable	[3]	$ 18.96
Weighted average remaining contractual term
Weighted average remaining contractual life, Outstanding at beginning of period		4 years 6 months	[2]	5 years 2 months 12 days
Weighted average remaining contractual life, Exercisable at end of period	[3]	4 years 2 months 12 days
Aggregate intrinsic value
Aggregate intrinsic value, Outstanding, at beginning of period		$ 6,447	[2]	$ 19,229
Aggregate intrinsic value, Exercisable at ending of period	[3]	$ 6,089
[1]	The SAR units are convertible for a maximum number of shares of the Company's common stock equal to 75% of the SAR units subject to the grant.
[2]	Due to the ceiling imposed on the SAR grants, the outstanding amount equals a maximum of 645,874 shares of the Company's common stock issuable upon exercise.
[3]	Due to the ceiling imposed on the SAR grants, the exercisable amount equals a maximum of 553,861 shares of the Company's common stock issuable upon exercise.

Summary of Stock Option Activ_2

Summary of Stock Option Activity (Parenthetical) (Detail) - shares		9 Months Ended
		Sep. 30, 2018		Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding amount of stock appreciation right units	[2]	707,415	[1]	729,017
Exercisable amount of stock appreciation right units	[2],[3]	610,731
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding amount of stock appreciation right units		645,874
Exercisable amount of stock appreciation right units		553,861
Stock Appreciation Rights (SARs) | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum percentage of stock appreciation right units		75.00%
[1]	Due to the ceiling imposed on the SAR grants, the outstanding amount equals a maximum of 645,874 shares of the Company's common stock issuable upon exercise.
[2]	The SAR units are convertible for a maximum number of shares of the Company's common stock equal to 75% of the SAR units subject to the grant.
[3]	Due to the ceiling imposed on the SAR grants, the exercisable amount equals a maximum of 553,861 shares of the Company's common stock issuable upon exercise.

Summary of Restricted Stock Uni

Summary of Restricted Stock Units Activity (Detail) - Restricted Stock Units (RSUs)	9 Months Ended
	Sep. 30, 2018$ / sharesshares
Number of RSUs
Number of RSUs, Unvested, Beginning balance | shares	560,616
Number of RSUs granted | shares	304,496
Number of RSUs vested | shares	(268,052)
Number of RSUs forfeited or expired | shares	(30,865)
Number of RSUs, Unvested, Ending balance | shares	566,195
Weighted average Grant-Date fair value
Weighted average Grant-Date fair value, Beginning balance | $ / shares	$ 29.31
Weighted average Grant-Date fair value, RSUs granted | $ / shares	34.83
Weighted average Grant-Date fair value, RSUs vested | $ / shares	27.73
Weighted average Grant-Date fair value, RSUs forfeited or expired | $ / shares	35.46
Weighted average Grant-Date fair value, Ending balance | $ / shares	$ 32.70

Equity-Based Compensation Expen

Equity-Based Compensation Expense Included in Interim Condensed Consolidated Statements of Income (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total equity-based compensation expense	$ 2,467	$ 2,219	$ 8,083	$ 6,346
Cost of revenues
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total equity-based compensation expense	155	125	480	330
Research and development, net
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total equity-based compensation expense	1,246	991	3,874	2,834
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total equity-based compensation expense	369	381	1,246	1,040
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total equity-based compensation expense	$ 697	$ 722	$ 2,483	$ 2,142

Assumptions Used to Estimate Fa

Assumptions Used to Estimate Fair Value of Employee Stock Purchase Plan (Detail) - Employee stock purchase plan	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield	0.00%	0.00%	0.00%	0.00%
Expected volatility, Minimum	38.00%	28.00%	35.00%	28.00%
Expected volatility, Maximum		43.00%	42.00%	46.00%
Risk-free interest rate, Minimum	2.20%	0.60%	0.70%	0.50%
Risk-free interest rate, Maximum		1.10%	2.20%	1.10%
Contractual term of up to	24 months	24 months	24 months	24 months

Derivatives and Hedging Activ_3

Derivatives and Hedging Activities - Additional Information (Detail) - Derivatives designated as cash flow hedging instruments - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in income, net	$ 63,000	$ (2,000)	$ 259,000	$ 186,000
Foreign exchange forward and option contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional principal amount of Hedging Contracts	$ 4,250,000		$ 4,250,000		$ 0

Fair Value of Outstanding Deriv

Fair Value of Outstanding Derivative Instruments (Detail) $ in Thousands	Sep. 30, 2018USD ($)
Derivative [Line Items]
Derivative Assets	$ 11
Derivative liabilities	11
Derivatives designated as cash flow hedging instruments | Foreign exchange forward contracts
Derivative [Line Items]
Derivative Assets	11
Derivatives designated as cash flow hedging instruments | Foreign exchange option contracts
Derivative [Line Items]
Derivative liabilities	$ 11

Net (Gains) Losses Reclassified

Net (Gains) Losses Reclassified from Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other comprehensive income (loss), Effective portion, Net, Total	$ 21	$ (2)	$ (259)	$ 180
Derivatives designated as cash flow hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other comprehensive income (loss), Effective portion, Net, Total	21	(2)	(259)	180
Gain (loss) reclassified from accumulated OCI into income, Effective portion, Net, Total	63	2	259	(186)
Derivatives designated as cash flow hedging instruments | Foreign exchange option contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other comprehensive income (loss), Effective portion, Net, Total	(2)	1	(128)	88
Gain (loss) reclassified from accumulated OCI into income, Effective portion, Net, Total	20	(1)	117	(88)
Derivatives designated as cash flow hedging instruments | Foreign exchange forward contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other comprehensive income (loss), Effective portion, Net, Total	23	(3)	(131)	92
Gain (loss) reclassified from accumulated OCI into income, Effective portion, Net, Total	$ 43	$ 3	$ 142	$ (98)

Changes in Accumulated Balances

Changes in Accumulated Balances of Other Comprehensive Income (Loss), Net of Tax (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			$ 244,670
Other comprehensive income (loss) before reclassifications	$ 46	$ 79	(958)	$ 438
Amounts reclassified from accumulated other comprehensive income (loss)	87	(2)	260	(142)
Other comprehensive income (loss), net of taxes	133	77	(698)	296
Ending balance	244,388		244,388
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(1,417)	(278)	(586)	(497)
Ending balance	(1,284)	(201)	(1,284)	(201)
Unrealized gains (losses) on available-for-sale marketable securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(1,342)	(278)	(586)	(502)
Other comprehensive income (loss) before reclassifications	28	82	(726)	277
Amounts reclassified from accumulated other comprehensive income (loss)	30	(5)	28	24
Other comprehensive income (loss), net of taxes	58	77	(698)	301
Ending balance	(1,284)	(201)	(1,284)	(201)
Unrealized gains (losses) on cash flow hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(75)			5
Other comprehensive income (loss) before reclassifications	18	(3)	(232)	161
Amounts reclassified from accumulated other comprehensive income (loss)	57	$ 3	$ 232	(166)
Other comprehensive income (loss), net of taxes	$ 75			$ (5)

Details about Reclassification

Details about Reclassification out of Accumulated Other Comprehensive Income Components (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of revenues	$ (2,006)	$ (1,726)	$ (5,966)	$ (5,030)
Financial income (loss), net	831	821	2,535	2,147
Research and development	(11,897)	(10,031)	(35,756)	(30,413)
Sales and marketing	(2,727)	(3,057)	(9,302)	(9,422)
General and administrative	(2,406)	(2,711)	(8,193)	(7,388)
Income (loss) before taxes on income	2,983	7,031	(882)	14,873
Income tax expense (benefit)	440	1,181	847	1,008
Net income	2,543	5,850	(1,729)	13,865
Reclassification out of accumulated other comprehensive income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income	(87)	2	(260)	142
Reclassification out of accumulated other comprehensive income | Unrealized gains (losses) on cash flow hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of revenues	(1)		(5)	4
Research and development	(55)	(2)	(225)	160
Sales and marketing	(3)		(10)	10
General and administrative	(4)		(19)	12
Income (loss) before taxes on income	(63)	(2)	(259)	186
Income tax expense (benefit)	(6)	1	(27)	20
Net income	(57)	(3)	(232)	166
Reclassification out of accumulated other comprehensive income | Unrealized gains (losses) on available-for-sale marketable securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Financial income (loss), net	(32)	7	(30)	(33)
Income tax expense (benefit)	(2)	2	(2)	(9)
Net income	$ (30)	$ 5	$ (28)	$ (24)

Share Repurchase Program - Addi

Share Repurchase Program - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	May 31, 2018
Class of Stock Disclosures [Abstract]
Additional common stock shares, authorized for repurchase					700,000
Purchase of treasury stock, shares	216,156	0	527,212	0
Purchase of treasury stock, per share value	$ 29.18		$ 31.76
Purchase of treasury stock	$ 6,308		$ 16,742
Common stock shares, available for repurchase	483,844		483,844